Mechanism for feeding material from rolls



Jan. '12 1926. 1 1,569,650

J. 5. CObDWELL MECHANISM FOR FEEDING MATERIAL FROM ROLLS Filed Dec. 29,1925 2 Sheets-$heet'1 [N V/iN TO A 5'. 6

Way

A TTORNEY J. s1 COLDWELL MECHANISM FOR FEEDING MATERIAL FROM ROLLS FiledDec. 29, 1923 2 Sheets-Sheet 2 Jan. 12 1926.

1,! TTORNE Y Patented-Jan. 12, 1926.

, 30m 8'. connwnnnor MI WAUKEE,

or MILWAUKEE, Wisconsin.

man we. co.,

WISCONSlIN, ASSIGNOR 'ILO THE CUTLER-HAM- A CORPORATION OF WISCONSIN.

MECHANISM FOR FEEDING MATERIAL FROM ROLLS.

Applicatlo .To all whom it may 'concern:' Be it known that I, J onx-'citizen of the United States, waukee, in' t he county of- Stateof'Wisconsin, useful Improvements in Feeding Material from Rolls,

S. ComwnLL, -a residing at Mil- Milwaukee and have invented new andMechanisms for of which the following is a full, clear, concise. andexact description, reference being had to the accompanying drawing,forming a part of this specification.

This invention-relates to mechanisms for receiving mafeeding'materialfrom rolls to i chines and more particularly t mechanisms for printingpresses.

-Web feeding mechanisms o web feeding for printing presses commonlyinclude braking means for effecting a drag on active web roll to tensionthe same is drawn into the press.

the spindle of an the material as 'Heretofore considerable. effort hasbeen made to provide a mechanism for regulating such braking means theweb substantially constant.

it has been found unnecessary to maintain the tension on However, in theoperation of printing presses to maintain a constant tension on the webproviding the variations in tension are gradual, more, effect a giventhe web when exhausted.

The present and further-- it has been found very desirable to reductionin the tension on the roll is about to become invention has among its objects to provide a web tensioning device which is adapted toautomatically effect a predetermined reduction in the tension on the webwhen the roll is about to become exhausted and which automaticallymaintains the tensionon the web b termined limits during unwi roll.Another object etween predending of the is to provide a tensioningdevice of the aforesaid character wherein the weight ofthe web ingmechanism therefor serves tension on the web.

roll and the supportto control the Another object is to provide a webtensioning device of the aforesaid character which is capable of controlf rom a remote point such as the delivery end of the press for variationof the tension on the web.

Another object is to provide a web tensioning mechanism of the aforesaidcharacter having its parts arrange d to facilitate December 29, 1923.Serial No. 683,806.

removal of an exhausted roll and installation of a new roll.

Another. object is to provide a web feeding mechanism, includingaplurality of web tensioning devices of the aforesaid character havingtheir parts arranged to facilitate pasting of the web of a reserve rollmounted on either of thedevices to the web of an exhausted roll mountedon the other.

Another object is to provide-a web feeding mechanism having improvedmargin adjusting means associated therewith.

Various other objectsand advantages of the invention will hereinafterappear.

The accompanying drawings illustrate certain embodiments of theinvention which will now be described. it being understoodthat theembodiments illustrated are susceptible of modification withoutdeparting from the scope of the appended claims.

In the drawings,

Figure 1 is an end elevational view of a web tensioning device embodyingthe invention. a

Fig. 2 is a side elevational view of such device, certain parts thereofbeing shown in section.'

Fig. 3 is a detail view of certain of the parts shown in Figs. 1 and 2.h

Fig. 4 is a'simplified end view of a web feeding mechanism including aplurality of the web feeding devices of the character shown in Fig 1,and

Fig, 5 is an end' elevational view of a part employed in the embodimentshown in Fig. 3, certain of the parts of the tensioning devices beingshown in section.

Referring to Figs. 1 and 2, the same illustrate spindles 1 and 2 forsupporting a web roll 3. The web roll 3 is provided with a hollow coremember (not shown in the drawing) and spindles 1 and 2 are adapted to beinserted into opposite ends of said core member to support the web rolland to rotate therewith. Spindles 1 and 2 are carried by arms 4 and 5,respectively, rotatably mounted upon a shaft 6, supported at op- Jarmsand l6,'respc ctively, which are fixed. to shaft 6.: As hereinaftersetforth, power left *thereof is supported by a ball bearing.

with a cooperating brake slide 14. ii rake shoes 13 and Marc pivotallysecured to operated means is provided for rotating shaft 6 to vary theangular position ofarms 1 5 and 16 for variation of the tension on theweb and power operated means is also provided for adjusting arr'ns' 4and 5 axially on shaft 6 to elfect margin adjustments of the web roll. y

More specifically, spindle 1 is slidably keyed within a hub 11 on brakedrum-ll and said hub projects outwardly beyond said brake drum inopposite directions. The left hand end of the .hub '11 is supported by aball bearing 17 mounted on the 11 per end of arm- 4: while the righthand end of said hub is supported by aball bearing 18 carried by abracket 19. fixed to arm 4.. As before stated, spindle l is slidably,keyed within thehub '11! and the same is adjustable'axially therein bya screw-20 threaded into the hand end ofsaid hub. The inner end of screw20 has an enlarged head 21 fitting within a'T'slot-in the end'gbfspindle 1 and said screw ha's an adjusting hand'wheel 22 fixed theretoand a locking hand'jwheel 23 threaded thereon for engaging the righthand end of hub 11%. S indle2 .is fixed within the 'hub of brake rum"-12fand the same is supported adjacent its right hand end by a ballbearingfi; mounted on the upper end of arm 5 while the left liandlendcarried by an arm 26 fixedto arm 5.- a

Springs27 and 28 tend tqmove arms 4;

and 5 in; a counter-clockwisedirection with 15 and 16, as shown inrespect to arms Fig. 1.

29 while spring 28 is held under compression betweeri'bracket 26 andthecap member.3 0. Cap members 29 and 30 each have anadi justing screw31 associated therewith, the screw associated with the former capmemher. being threaded into a lug 15" Offfiijlfl: l5 and thescrewassociated with the'latter' cap member being threaded into a lug 16 onarm 16. Each of the arms 15-and 16 has a lever 32 pivotally securedthereto and each of said arms is provided with a projecting l ug havinga drilled opening thereinfor receiving a pin 33. The inner end of thepin; 33 associated witharm '15 is arranged to abut bracket 19 while theinner "end of--the pin 33.associated with arm 16 is arranged toabut'bracket 26. As shown in. Fig. 3. the levers 32 are each providedwitha camsurface .34 and upon movement of said levers from the positionindicated in full lines to the position indicated in A dotted linesin'Fig. 3, said cam surfaces are adapted to move the pins 33 inwardly,to

.cause'ar'ms 4 and am move in. a counter- Spring 27; is held under.compre s 'sion between bracket 19 and a' cap member-,-.

clockwise direction with respect to the arms 15 and 16 for disengagementof brake-drums 11 and 12 fromtheir respective-brake,shoes.

[Each of the levers 15 and 16 is provided [with a spring'cli 35 forholding its associated lever 32 1n the position indicated by full linesin'Fig 3.

The function and operation of the aforedescribed web tensioningmechanism will now be more fully set'forth. Assuming that the web :rollis in the position indicated in full j iii"". Fig. 1, it is apparentthatthe weight'of 'the'- we b roll together with the weight"of -a rm's iand5 and the parts carried-by the latter, .is resolved into two component'forces'. Qne ofsuch forces is in a line extending between the axis ofweb roll' 3 and the axis of shaft 6.7and the other-is. at

right angles to the former force-and'tends-gt to hold the brake drumslland 12 injengagement with their respective brake'sho'es. It will beobserved .that the ratio of such forces. is dependent upon the angular:p os i- 1i tion'of arms .15 and .16. Neglecting'fthe weight of arms iand5 ja'nd the parts can ried thereby, the 'force tendingtofPhold brakedrums 11 and'12 in engagementwitlrtheir respective brake shoes isdetermined by the weight of -the webrollrand it isapparent that duringunwinding ofthe web- 91 1 roll' such force tends to produce a tension onthe web which varies in accordance with the-diameter ofv the roll."Neglectingthe weight of. the roll. the weightfof the arms 7 1 and 5 andth'efpart carried thereby tends -..-to hold brakedr'ums' 11and'12i-in-engagement with their respective shoes tofproduce a ,-brakingefie cton the web [roll which-is determined by the degree ofcompression.- of

springs27 and 28 lheibrakirig e'flect'due to thewei parts carriedthereby51produces a relatively slight tension o'ir the "web of largediameter 1 but as the roll decreases the lten to" such brakingyefielc.in. v the roll diam'e'ter'v decrea esa force, due to" the tension 011.aie' wga-g ends to move the -brake f1 1'- and;fT 12 .Qutiof engagementwith thirrespective shoes and when the roll isofrelative smalldiametergheor the arms andfo' and the. vtgienitheroll is Also,- asincreasing such force'tends to'counteradtthe braking effect due .to theweight offith 5 and the partsearried there that when the T011 is oflargefdiaifieterthe From the foregoing 'itj'willabe bs erv'ed.

tension "the web is almost. entirely de termined by a com onent due tothe weight of the web roll whilewhenthe rollis-about to become exhaustedthe tension on the web is determined almost entirely bya coin 'onent dueto the weight of'the; arms t an 5 and the parts carried thereby. Thus;"the initial tension on'the' web can be controlled by varying the.angular position of the arms of the web rolls.

4 and 5 while the final tension on the web can be determined by varyingthe degree of compression of springs 27 and 28.- In connection with thef'iwegoin'g it should be noted that during starting of the press thebraking meanscan be rendered ineffective and thus prevent breaking ofthe web, by moving the levers 32 to the position indicated in dottedlines in Fig. 3.

As before stated, power operated means is provided for rotating shaft (3to vary the angular position of arms 1-5 and 16 and, as best shown inFig. 1, such means includes a motor 36 mounted upon a bracket carried bypedestal 8. Motor 36 is operatively connected to a counter shaft 37through the medium of a spur gear 38 and a pinion 39- and shaft 6 isdriven from said countershaft through the medium of a worm wheel 40 andworm 41. Motor 36 can be controlled from any desired point, such as thedelivery end of the press and the same can be also controlled from apoint in proximity to the tensioning device to facilitate installationinstalling a web roll In the motor 36 is operated to bring the spindlesl and 2 on a: level with the core member of the web roll, the latterbeing on the floor. The web roll is then rolled into position betweenthe spindles 1 and 2 and upon alinement of the spindles with the'coremember the same are forced into such core member by means of screw 20.The motor 36 is then operated to elevate the roll to the desiredposition.

Also, asbefore stated, power operated means isprovided for adjustingarms 4 and 5 axially on shaft 6 to effect margin adjustments of the webroll. As'shown in Fig.2, such means comprises a motor 42 mounted upon abracket fixed to a bearing pedestal 8 and adapted to drive a screw shaft43 through the medium of a worm wheel 44 and worm 4:). Screw 43 has itsleft end rotatably mounted within a suitable bearing on pedestal 8. thesame being held against axial movement within said bearing, and theright hand end of said screw extends into a nut carried by a. bracket47. Bracket 47 is mounted upon the connecting member 9, between arms 4and 5 by a cap member 48 and the same is held against axial move ment onsaid member but is free to rotate thereon. Thus it is apparent that uponreverse operations of .notor 42, screw 43 will effect axial adjustmentsof arms 4 and 5 on shaft 6 to effect margin adjustment of the web roll3. i

Referring now to Fig. 4, the same illustrates a pair of web tensioningdevices A and B of the character. hereinbefore described, such devicesbeing arra-nged-side by side and in a reversed relation. The shafts 6 ofthe tension devices are supported at opposite ends by pedestals C, oneof which devices while the roll on the other device is and that theextremity of the reserve web roll can be readily connected 'to the webproceeding from the active roll prior to exhaustion of the latter. Inconnecting the 'web ofthe reserve roll to the web of the active roll thepress is stopped and the web rolls are brought to the position shown inFig. 4. Paste having been previously applied to the outer surface of theextremity of the reserve web roll, it is apparent-that such extremitycan be readily connected to the web proceeding from the active roll.After connection of the webs the press is started and the web of theactive roll is severed. During such pasting operations the brake drumsarereleased from their respective brake shoes by means of the levers 32and after the press is started the drums associated with the new rollare moved into engagement with their respective brakes by returning suchlevers to-normal position.

\Vith the tension devices arranged as shown in Fi g. 4, the marginadjusting means active,

is arranged to eifect simultaneous margin adjustments of both of thedevices. The con- .necting members 9 of the tensioning devices aresecured together by a bracket 49 (Fig. 5) such bracket being providedwith a screw threaded part 50 for receiving the margin adjusting screw43.

\Vhat I claim as new by Letters Patent is:

1. drawn from a \veb'roll comprising means for imposing a frictionaldrag on sald roll and for rendering such drag proportional to the weightof said roll, said means including means for resolving the weight ofsaid roll into component forces, one of which is effective to controlsuch drag.

2. A-mechanism for tensioning material drawn from a web roll, comprisingmeans for imposing a. frictional and for rendering such dragproportional to the weight of said roll, said means including meansadapted to resolve the weight of said roll into component forces, one ofwhich is effective to control such drag, said latter'means beingadjustable to vary the ratio of such component forces.

3. In a mechanism for tensioning material drawn from a. web roll, incombination, a brake drum to be fixed to said roll to rotate therewith,abrake shoe for engaging said drum to' tension drawn from said roll, andsupporting means and desire to secure the web as the same is A mechanismfor tensioning material drag on said roll Jiirake shoe, said drumtending to move tofor adapted to resolve the v'eight' thereof'iiito comonent forces, one of wh ch facts to'hold sai drum in engagement with heratio of such component forces; 1 a mechanismfor tensioningmaterial-,drawn from a web roll, in combination, a brake :dru'rnto rotate withsaid roll, a cooperating brake shoe forengaging said drum to tension thematerial drawn from said'roll and means for holding said drum inengagement with, said shoe under the action of the weight of said rolland in a direction at an angle to the vertical, said means beingadjustable to vary such angle for variation of the tension on the web.

5. In a mechanism for tensioning material drawn fro'm -a webroll, incombination,

supporting means for theweb roll rotatable -"about an axis to one sideof said roll, a brake drum associated with said roll to ro- -Tt'attherewith and abrake shoe for engag- ".Ling said drum, said shoe beingadjustable to vary the angular position of said roll "with respect tosaid axis for variation of the "pressure of said drum on said shoe.

- '6. In a mechanism for tensioning material "drawn from a web roll, incombination, a supporting frame forthe web roll including alinedspindles to be inserted into opposite ends of the roll to support thesame and to rotate therewith, said frame being rotatable about an axisparallel to said spindles, a

" brake drum fixed to one of said spindles and a brake shoe for engagingsaiddrum to -tension the web as the saine is drawn from said roll;-,eaid shoe being adjustable to vary thean ular position of said framefor varia- 3 tion 0 the tension on the web.

7. In a mechanism for tensioning material drawn. from a web roll, incombination. a snpporting frame for the web roll including rotatetherewith, said rame being rotatable about an axis parallel to saidspindles, "a blfake'gdrumiffixed to oneof said spindles, a cooperatingbrake shoe for engaging said drum to tension the material, proceedingfrom the roll and a supporting arm for said 'gwa'rds said shoe under theaction of the "weight-of said frame andthe roll'mounted thereon, andsaid arm being movable to vary the angular position of-said frame.

In a mechanism for tensioning material drawn from a web roll, incombination, a

rotatable frame including alined spindles to be insertedinto oppositeends of the roll to sup ort the same and to rotate therewith, a

'bra e drum fixed to each of said spindles,

a brake. shoe associated with each of said f drums and adapted throughengagement with the latter'to hold said frame in differcut angularpositions and rotatable sup- 'sai'd,i -shoe,-said means being adjustableto ,Pd'rawn from a web roll, in combination, a supporting frame for saidweb roll, 1nclud-' spindles to be inserted into opposite erids oftheroll to support the same and to porting arms for said shoes, saidframe and in alined spindles, for supporting the web r0 1 and to rotatetherewith, said frame being rotatable about an axis vparallel to saidspindles, spindles, a gaging said drum to tension the material 'drawnfrom said roll, a rotatable supporting arm for said shoe and means formoving said frame with respect to said arm to disengagesaid drum fromsaid shoe.

10. In a mechanism for tensioning mate-' a brake drum fixed to one ofsaid cooperating brake shoe for en-' rial drawn from a' web roll, incombination,

a supporting shaft, a frame rotatably mounted on said shaft andincluding spindles to be inserted into opposite ends of the web roll tosupport the same and to rotate therewith, said spindles being arran edparallel to the axis of said shaft, a braiie drum fixed to one of saidspindles, a cooperating brake shoe, a supporting arm for said means forrotating said shaft to vary the angular position .of said arm.

11. A mechanism of the character de: scribed, including separate framesfor supporting a .pair of web rolls in a parallel relation each of saidframes being provided wiin alined spindles for receiving a web rolltherebetween and be rotatable about an axis parallel t6 said splndles toprovide for positioning of said rolls with their pemounted on the other.i

brake shoe fixed to'said shaft and 12. A mechanism of the character d'escribed includin se arate frames for supporting a pair 6 weh rolls in aparallel relation, each of said frames being provided with alinedspindles for receiving a web roll therebetween and being rotatable aboutr0 ls to the web of the other. a

,13. A mechanism of the character de scribed includin" se arate framesfor sup- I portingapair' o we rolls in a parallel relation, each of saidframes being provided with alined spindles for receiving a web rolltherebetweenand being rotatable'about an'axis parallel to said indles,tensioning means associated with eac of said spindles,

said means being adapted to hold said frames in varying angularpositions. for variation of the tension on the web'and being also,adapted to move said frame: to a an axis parallel to said spindles 'tofacili- J'position wherein said rolls are adjacent each other 'tofacilitate sealing of the'webmounted on either of.

roll

extremity of a said framesto the web extending from the roll mounted onthe other of said frames.

rolls adjacent each other to facilitate seal;

2o ing of the web extremity of the latter web roll to the web proceedingfrom the former.

15. A mechanism of the character described including separate frames forsupporting a pair of web rolls in a parallel relation, each of saidframes being provided with 'alined spindles for receiving a web rolltherebetween and being rotatable about an axis parallel to saidspindles, a brake drum fixed to one of the spindles of each of saidframes, cooperating brake shoes for said drums, supportin arms'for saidbrake shoes,.power operate means for varying the angular position ofsaid arms, and power operated means for'effecting axial adjustment ofsaid frames.

- 16. In a mechanism for tensioning material drawn from a web roll, incombinaparallel i rotate therewith, said frame bein tion, a supportinframe for said roll ineluding alined spindles for supporting thewebrolland to rotate therewith, said frame being rotatable about an axisparallel to said s indles, a brake drum fixed to one ofsai spindles, acooperating brake shoe for engaging said drum to tension the materialdrawn from: said roll,- said drum tend ing to move towards said brakeshoe under the action of the weight of said frame and said roll,- meansfor adjusting-said brake 1 shoe to. vary theangular position-of saidframe, and auxiliary means move sa d drum out of engagement with saidshoe. 17. In a meehanismfor tens onmg material drawn from a web-roll, incombination,

a supporting frame for the roll including aligned spindles to supportthe roll and to g rotat able about an axis'parallel to saidspindles,

a brake drum fixed to one of said spindles,

a brake shoe for engaging said drum to tension the material drawn fromsaid roll,

a rotatable supporting arm for said shoe, said drum tending to movetoward said shoe under the actionof the weight of said rollandsaid'frame, and-said arm being adjustable to vary the angular positionof said frame. and auxiliary means associated with said arm and tendingto move said frame in a direction to disengage said drum from said shoe,said latter means being adjustable to vary the effectiveness thereof.

In witness whereof, I have hereunto subscribed my name.

JOHN s. COLDWELL.

tending to

